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godoc update for scheduler predicates.

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This commit is contained in:
Guangya Liu 2017-06-06 23:29:35 +08:00
parent 53a66020e4
commit aaac9228a2
1 changed files with 12 additions and 0 deletions
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12
plugin/pkg/scheduler/algorithm/predicates/predicates.go
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@ -564,6 +564,9 @@ func podName(pod *v1.Pod) string {
return pod.Namespace + "/" + pod.Name return pod.Namespace + "/" + pod.Name
} }
// PodFitsResources checks if a node has sufficient resources, such as cpu, memory, gpu, opaque int resources etc to run a pod.
// First return value indicates whether a node has sufficient resources to run a pod while the second return value indicates the
// predicate failure reasons if the node has insufficient resources to run the pod.
func PodFitsResources(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) { func PodFitsResources(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
node := nodeInfo.Node() node := nodeInfo.Node()
if node == nil { if node == nil {
@ -693,6 +696,7 @@ func podMatchesNodeLabels(pod *v1.Pod, node *v1.Node) bool {
return nodeAffinityMatches return nodeAffinityMatches
} }
// PodMatchNodeSelector checks if a pod node selector matches the node label.
func PodMatchNodeSelector(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) { func PodMatchNodeSelector(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
node := nodeInfo.Node() node := nodeInfo.Node()
if node == nil { if node == nil {
@ -704,6 +708,7 @@ func PodMatchNodeSelector(pod *v1.Pod, meta interface{}, nodeInfo *schedulercach
return false, []algorithm.PredicateFailureReason{ErrNodeSelectorNotMatch}, nil return false, []algorithm.PredicateFailureReason{ErrNodeSelectorNotMatch}, nil
} }
// PodFitsHost checks if a pod spec node name matches the current node.
func PodFitsHost(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) { func PodFitsHost(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
if len(pod.Spec.NodeName) == 0 { if len(pod.Spec.NodeName) == 0 {
return true, nil, nil return true, nil, nil
@ -864,6 +869,7 @@ func (s *ServiceAffinity) checkServiceAffinity(pod *v1.Pod, meta interface{}, no
return false, []algorithm.PredicateFailureReason{ErrServiceAffinityViolated}, nil return false, []algorithm.PredicateFailureReason{ErrServiceAffinityViolated}, nil
} }
// PodFitsHostPorts checks if a node has free ports for the requested pod ports.
func PodFitsHostPorts(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) { func PodFitsHostPorts(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
var wantPorts map[int]bool var wantPorts map[int]bool
if predicateMeta, ok := meta.(*predicateMetadata); ok { if predicateMeta, ok := meta.(*predicateMetadata); ok {
@ -897,6 +903,8 @@ func haveSame(a1, a2 []string) bool {
return false return false
} }
// GeneralPredicates checks whether noncriticalPredicates and EssentialPredicates pass. noncriticalPredicates are the predicates
// that only non-critical pods need and EssentialPredicates are the predicates that all pods, including critical pods, need
func GeneralPredicates(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) { func GeneralPredicates(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
var predicateFails []algorithm.PredicateFailureReason var predicateFails []algorithm.PredicateFailureReason
fit, reasons, err := noncriticalPredicates(pod, meta, nodeInfo) fit, reasons, err := noncriticalPredicates(pod, meta, nodeInfo)
@ -976,6 +984,9 @@ func NewPodAffinityPredicate(info NodeInfo, podLister algorithm.PodLister) algor
return checker.InterPodAffinityMatches return checker.InterPodAffinityMatches
} }
// InterPodAffinityMatches checks if a pod can be scheduled on the specified node with pod affinity/anti-affinity configuration.
// First return value indicates whether a pod can be scheduled on the specified node while the second return value indicates the
// predicate failure reasons if the pod cannot be scheduled on the specified node.
func (c *PodAffinityChecker) InterPodAffinityMatches(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) { func (c *PodAffinityChecker) InterPodAffinityMatches(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
node := nodeInfo.Node() node := nodeInfo.Node()
if node == nil { if node == nil {
@ -1234,6 +1245,7 @@ func (c *PodAffinityChecker) satisfiesPodsAffinityAntiAffinity(pod *v1.Pod, node
return true return true
} }
// PodToleratesNodeTaints checks if a pod tolertaions can tolerate the node taints
func PodToleratesNodeTaints(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) { func PodToleratesNodeTaints(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
taints, err := nodeInfo.Taints() taints, err := nodeInfo.Taints()
if err != nil { if err != nil {